| 对称故障下基于无通道保护的配电线路自动化 |
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| 引用本文： | 刘琨,董新洲,施慎行,王宾.对称故障下基于无通道保护的配电线路自动化[J].清华大学学报(自然科学版),2011(11). |
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| 作者姓名： | 刘琨 董新洲 施慎行 王宾 |
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| 作者单位： | 清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室; |
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| 基金项目： | 国家自然科学基金项目(50937003,51007045,51120175001); 北京市自然科学基金资助项目(3102017); 清华大学电力系统及发电设备控制和仿真国家重点实验室重点资助项目(SKLD09M04); 国家科技支撑计划资助项目(2006BAJ16B02) |
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| 摘 要： | 配电线路无通道保护能在不依赖通讯的前提下快速、有选择性切除不对称故障,以此为核心的配电线路自动化系统在发生对称故障时却性能不佳。该文提出一种在对称故障时快速切除故障、闭锁备用电源投入的方案:靠近电源的配电线路无通道保护在对称故障时瞬时动作切除故障,避免电气设备过热损坏;备用电源自动投入装置检测电压跌落时两周期前的负序电压大小,避免环网开关在对称故障时合闸到永久性故障后再次跳闸。EMTP(electro-magnetic transient program)仿真验证了该方案的有效性。
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| 关 键 词： | 配电线路自动化 对称故障 配电线路无通道保护 备用电源自动投入装置 |
Distribution line automation based on noncommunication protection for symmetrical faults |
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| LIU Kun,DONG Xinzhou,SHI Shenxing,WANG Bin.Distribution line automation based on noncommunication protection for symmetrical faults[J].Journal of Tsinghua University(Science and Technology),2011(11). |
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| Authors: | LIU Kun DONG Xinzhou SHI Shenxing WANG Bin |
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| Institution: | LIU Kun,DONG Xinzhou,SHI Shenxing,WANG Bin(State Key Laboratory of Control and Simulation of Power System and Generation Equipments,Department of Electric Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | Distribution line non-communication protection(DNCP) can quickly and selectively isolate unsymmetrical faults,but the performance of the distribution line automation system is not satisfactory with symmetrical faults.This paper presents a scheme which can quickly isolate symmetrical faults and block the operation of the reserve power source automatic connection device(BZT).The DNCP which is closed to the source operates instantaneously to avoid overheating of the electrical equipment.When the voltage magnit... |
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| Keywords: | distribution line automation symmetrical fault distribution line non-communication protection reserve power source automatic connection device |
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